Add number of commits to release stats

Zachary Scott · Zachary Scott · commit 7eed44ffc506 · 2016-01-04T20:55:49.000+09:00
diff --git a/_posts/2015-11-18-mruby-1.2.0-released.markdown b/_posts/2015-11-18-mruby-1.2.0-released.markdown
@@ -14,6 +14,7 @@ mruby 1.2.0 is released. Download [mruby 1.2.0][mruby-1.2.0-dl] now.
 
 ## mruby 1.2.0 by the numbers
 
+* 778 commits
 * 24 [contributors][contributors]
 * 202 changed files
 * 3,947 additions(+)
